・ I tried wrapping a lunch box with it once. I have not used it or taken it outside. ・ Photos 5-6 are from a different design of the product I am selling. ・ I opened it for the purpose of listing it for sale. ・ Size is 41 x 41cm. I think it's sturdy because it's made of two layers: aluminum and the outer fabric. ・ The belt is Velcro. ※ I am selling different colors and patterns. ※ Please inquire about discounts for bulk purchases. I have stored it in a drawer at home. I am selling it because the lunch box my child uses has become larger before I could use it.